cpuid: allow unused unsafes

Rust 1.94 has switched a number of cpuid-related methods from
unsafe to safe. We initially removed the "unsafe" block to make
clippy happy, but this would make libkrun harder to package on
distros that are a bit conservative with their Rust versions.

Since there isn't any real impact, let's temporarily allow unused
unsafes on the affected methods instead.

Suggested-by: Daniel Müller <deso@posteo.net>
Signed-off-by: Sergio Lopez <slp@redhat.com>

Author: slp

src/cpuid/src/brand_string.rs

@@ -102,6 +102,7 @@ impl BrandString {
 
     /// Creates a brand string, initialized from the CPUID leaves 0x80000002 through 0x80000004
     /// of the host CPU.
+    #[allow(unused_unsafe)]
     pub fn from_host_cpuid() -> Result<Self, Error> {
         let mut this = Self::new();
         let mut cpuid_regs = unsafe { host_cpuid(0x8000_0000) };

src/cpuid/src/common.rs

@@ -18,6 +18,7 @@ pub enum Error {
 }
 
 #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
+#[allow(unused_unsafe)]
 pub fn get_cpuid(function: u32, count: u32) -> Result<CpuidResult, Error> {
     // TODO: replace with validation based on `has_cpuid()` when it becomes stable:
     //  https://doc.rust-lang.org/core/arch/x86/fn.has_cpuid.html